Abstract: A puncture-sealing tubeless pneumatic tire having an inner layer of soft, tacky, extensible sealant consisting of (1) at least one vinylidene-terminated liquid polymer and (2) at least one amine.

Abstract: A tire with a radial carcass reinforcement and a tread reinforcement formed of at least two superimposed work plies of wires or cables is improved due to the fact that between the radial carcass reinforcement and the tread reinforcement there is arranged a limiting block of two superimposed plies whose axial width is between a maximum value M.sub.b =(-80 H/B)+100 and a minimum value m.sub.b =(-48 H/B)+60, these values being expressed in percentage of the overall maximum axial width B of the tire, H being the overall radial height of the tire on a rim.

Abstract: A pneumatic radial tire having reduced rolling resistance is provided. The tire has a novel tread composition comprising 100 parts by weight of rubber of which at least 90 parts by weight is cis-polyisoprene. The tread composition also has less than 10 parts by weight of processing oil and from 30 to 60 parts by weight of carbon black wherein said carbon black has a particle size greater than about 35 millimicrons and a dibutyl phthalate absorption value greater than 100.

Abstract: An all-season tire tread having a circumferentially extending central rib together with a plurality of laterally spaced intermittent but circumferentially extending ribs on each side of the central rib with all of these ribs being separated by circumferentially extending grooves wherein a plurality of laterally continuous cleats are placed in circumferentially spaced relation about the tire and extend transversely outward of the central rib toward the closest respective tread edge wherein the circumferential cleat spacing is such that at least two laterally spaced cleats are in contact with the road surface during every footprint of the tire, with a plurality of lateral slots being in communication with the several grooves so as to promote water removal from the footprint area of the tire.

Abstract: A radial carcass tire is improved due to the fact that a limiting block composed of two crossed plies is interposed between the radial carcass reinforcement and the tread reinforcement. These two plies have wires or cables which have low extensibility and which form with the longitudinal direction angles whose value is other than zero and less than one-half of the smallest angle used in the tread reinforcement.

Abstract: A pneumatic radial tire has a two-ply tread reinforcing breaker wth cords of filamentary material. The breaker plies are of unequal widths and arranged symmetrically with respect to the median circumferential or equatorial plane of the tire, the overall width of the breaker being substantially the width of the overlying tread. In the region of each shoulder of the tread, the edges of one ply are folded back on themselves forming superimposed two-ply regions and three-ply regions enclosing the edges of a narrow, non-folded ply. Surrounding each two-ply region of the folded ply is a cushion rubber which is softer than the tread or breaker skimcoat rubbers. The breaker construction substantially eliminates breaker edge separation, resulting in a more durable radial tire which can be recapped to provide further service.

Abstract: A tire having a ratio H/B at most equal to 0.75, H being the radial height of the tire on its rim and B the maximum axial width of the tire, is improved due to the fact that between the radial carcass reinforcement and the tread reinforcement there are arranged two limiting blocks which are located on opposite sides of the equatorial plane. Each limiting block is formed of two superimposed crossed plies of wires or cables of low extensibility which form with the longitudinal direction angles of opposite sign, each being both other than zero and less than one-half of the smallest angle used in the tread reinforcement.

Abstract: A radial carcass tire with a tread reinforcement is improved due to the fact that between the radial carcass reinforcement and the tread reinforcement there is arranged a limiting block composed of two superimposed crossed plies whose wires or cables form opposite angles with the longitudinal direction, each of which is other than zero and less than the smallest angle used in the tread reinforcement.

Abstract: A tire with an asymmetric radial carcass reinforcement is improved due to the fact that on the side of the median plane of the beads which corresponds to the sidewall having the greatest curvature there is arranged a block for limiting the swing of the crown, this swing-limiting block being interposed between the radial carcass reinforcement and the tread reinforcement in the zone of parallelism between these two reinforcements. An expansion-limiting block is arranged on the other side of the median plane of the beads.

Abstract: A vehicle tire having first areas of a higher degree of rigidity and second areas of a lower degree of rigidity, the first and second areas having different degrees of radially inward recession upon contact of the tire with the ground and being alternately arranged in the circumferential direction of the tire. Each of the second areas comprises a central projection and a plurality of projections surrounding the central projection in spaced relation and spaced from each other. Some of the projections which are located at the tread edges have side surfaces extending substantially parallel to a radial plane through the tire. The outermost projections disposed adjacent to the projections at the tread edges have side surfaces facing the ground and extending substantially perpendicularly relative to the side surfaces of the projections at the tread edges. With this arrangement, the tire can be driven with an increased degree of driving force on rough ground or terrain, such as sand and/or gravel.

Abstract: A pneumatic safety tire with a pair of annular rubber reinforcements having crescent sectional shape and applied to a tire carcass at tire sidewalls, the rubber of the reinforcements having a JIS hardness of not less than 70, a tensile stress (Mod.sub.25) after an aging test of not less than 10 kg/cm.sup.2, and a repulsive elasticity by Dunlop tripsometer of not less than 65%.

Abstract: A tire of the radial or crossing ply carcass type with an asymmetric tread reinforcement is improved due to the fact that a correction block is interposed between the assymetric tread reinforcement and the carcass reinforcement. This correction block consists of two plies of wires or cables which form with the longitudinal direction angles of opposite sign, each both other than zero and less than one-third of the smallest angle used in the asymmetric tread reinforcement. The correction block is preferably centered on the equatorial plane of the tire.

Abstract: A tire with a radial carcass reinforcement and a tread reinforcement of at least two crossed plies is improved due to the fact that between the radial carcass reinforcement and the tread reinforcement there is arranged a limiting block formed of two crossed plies whose wires or cables form opposite angles with the longitudinal direction, each of which is other than zero and less than one-quarter of the smallest angle used in the tread reinforcement.

Abstract: A radial carcass tire with a tread reinforcement comprising a wide work ply included between two work plies each having half the width of the wide work ply is improved due to the fact that between this tread reinforcement and the radial carcass reinforcement there is arranged a limiting block composed of two superimposed crossed plies of wires or cables of low extensibility forming with the longitudinal direction of the tire opposite angles, each of which is other than zero and less than one-half of the smallest angle used in the tread reinforcement.

Abstract: A highly durable pneumatic tire comprising a carcass body formed by a number of laminated bias laid plies each including rubberized organic textile cords is disclosed. The carcass body is composed of at least two kinds of ply groups whose cords are the same in diameter, but different in the number of twists per unit length, the cords of the outermost ply group of the carcass having the number of twists which is 5% to 30% times larger than the number of twists of the ply group adjacent to the outermost ply group and located at the inner portion in the carcass and which is at least equal to the number of twists of the cords of the innermost ply group, and the cords of the innermost ply group of the carcass having the number of twists which is 5% to 30% times larger than the number of twists of the ply group adjacent to the innermost ply group and located at the outer portion in the carcass.

Abstract: A pneumatic run flat tire for motorcycles having a high handling stability during straight and zigzag runnings, cornering stability and durability, even when the tire is punctured while running and the pneumatic pressure inside of the tire becomes equal to atmospheric pressure. The run flat tire has a pair of sidewall-reinforcing layers, each comprising an elastic filler extending from an end location adjacent a bead core in a bead portion to the other end location in a tread portion through a sidewall portion of the tire, the elastic filler being reinforced with at least two reinforcing plies, one of which extends along one side surface of the elastic filler toward the tread portion, and then, additionally extends into the tread portion, and the other one of which extends along the other side surface of the elastic filler toward the bead portion, and the, additionally extends into the tread portion.

Abstract: A belted one-ply radial tire is disclosed which is characterized by a circumferential cord-fabric insert between the inner liner and the ply. The insert is of a material with good compressive fatigue resistance such as polyester cord. The single ply is continuous. The benefits of the high modulus radial ply cords are thus retained, and the disadvantages due to the poor compressive fatigue resistance of such cords are reduced or compensated for by the insert so that a durable one-ply radial tire with improved low rolling resistance is obtained.

Abstract: A highly durable pneumatic tire for aircraft is disclosed. The tire comprises a tread, a plurality of main grooves formed on the tread and extending substantially in the circumferential direction of the tire, and circumferential ribs spaced apart from each other by the main grooves. Among ribs coming into contact with ground under load, an outer contour of an outermost rib is made substantially discontinuous with respect to an outer contour of each of ribs adjoining the inside and outside of the outermost rib in the widthwise direction of the tire and is located at the inside of the outer contour of the adjoining ribs in the radial direction of the tire.

Abstract: A safety pneumatic tire which can improve running distance under punctured condition comprising an annular resilient reinforcing body having a maximum thickness corresponding to 4 to 9% of the tire maximum width and a JIS hardness of at least 60.degree. in which a ratio of the tire maximum width TW to the rim width RW is 1.0.ltoreq.TW/RW.ltoreq.1.3.

Abstract: A spare tire which is expandable by inflation, having a radial carcass reinforcement anchored to at least one bead ring in each bead and having a tread reinforcement formed of at least two plies of cables which are parallel in each ply and crossed from one ply to the next and form acute angles with the longitudinal direction of the tire, is improved due to the fact that the plies are composed of cables whose elasticity decreases as the inflation pressure increases and as the tire passes from the collapsed condition to the expanded condition ready for travel.